title: Identification of cut-points in commonly used hip osteoarthritis-related outcome measures that define the patient acceptable symptom state (PASS).
abstract: To determine patient acceptable symptom state (PASS) estimates in outcome measures commonly used in hip osteoarthritis (OA). Identification of cut-points on commonly used outcome measures associated with patient satisfaction with their current state of health. As part of a randomized controlled trial, 70 patients with a clinical diagnosis of hip OA undergoing a 9-session physiotherapy treatment program completed four physical performance measures and three self-report measures at 9 weeks and 1 year. Upon completion of treatment, patients assessed their current health status according to the PASS question. Cut-points were estimated using receiver operating characteristic curves (anchor-based method), based on the patient's response to the PASS question. At 9 weeks and 1 year, identified cut-points were, respectively, ≤10 and ≤11 for the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain subscale; ≤35 and ≤40 on the WOMAC physical function subscale; ≥+5 and ≥+6 on the global rating of change score; ≤6.05 and ≤5.30 s for the timed-up-and-go; ≤28.3 and ≤24.9 for the 40-m self-paced walk test; ≥11 and ≥12 repetitions for the 30-s chair stand test; and ≥46 repetitions for the 20-cm step test. Initial target cut-points signaling patient satisfaction with their current symptom state following physiotherapy in patients with hip osteoarthritis were determined for seven outcome measures over 1 year.
authors.affiliation: Department of Physical and Occupational Therapy, University of Illinois at Chicago Medical Center, Chicago, IL, USA.
authors.forename: Alicia J
authors.initials: AJ
authors.lastname: Emerson Kavchak
authors.forename: Chad
authors.initials: C
authors.lastname: Cook
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Hegedus
authors.forename: Alexis A
authors.initials: AA
authors.lastname: Wright
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D059026:Diagnostic Self Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy; D010147:Pain Measurement; D017060:Patient Satisfaction; D026741:Physical Therapy Modalities; D012720:Severity of Illness Index; D063189:Symptom Assessment